LDPC-DFH编码调制与系统性能仿真  

LDPC-DFH Coded Modulation and System Performance Simulations

作　　者：白玉洁[1] 罗伟雄[1] 梁富林[2] 

机构地区：[1]北京理工大学信息科学技术学院电子工程系,北京100081 [2]北京北广科技股份有限公司研究院,北京100016

出　　处：《系统仿真学报》2009年第17期5532-5535,共4页Journal of System Simulation

摘　　要：研究短波差分跳频(DFH)通信系统适用的编码调制方案。将DFH系统频率转移函数看作一个编码器,利用多元域低密度奇偶校验(LDPC)码代替普通的频率转移函数生成跳频点序列,形成一种新的LDPC-DFH编码调制技术。给出LDPC-DFH的译码算法,并对高斯白噪声信道和短波(HF)信道下LDPC-DFH系统进行仿真。仿真结果表明,与传统DFH系统相比,LDPC-DFH系统的性能更优,而且在短波信道下仍能保持较好的误比特率性能。Special coded modulation methods for differential frequency hopping （DFH） communication system over HF channel were studied. As an encoder in DFH system, the traditional frequency transition function was replaced by a LDPC code which gave the frequency hopping sequence. A novel LDPC-DFH coded modulation technique was proposed and corresponding decoding algorithms are given. The performances of LDPC-DFH system were simulated under A WGN channel and HF channel model Simulation results show LDPC-DFH system performs better than conventional DFH system, and it still has good BER performance in HF channel.

关 键 词：LDPC码 差分跳频 迭代译码 短波信道 

分 类 号：TN97[电子电信—信号与信息处理]